septillion Meaning, Definition & Usage

  1. noun the number that is represented as a one followed by 24 zeros

WordNet

Sep*til"lion noun
Etymology
F. septilion, formed fr. L. septem seven, in imitation of million.
Definitions
  1. According to the French method of numeration (which is followed also in the United States), the number expressed by a unit with twenty-four ciphers annexed. According to the English method, the number expressed by a unit with forty-two ciphers annexed. See Numeration.

Webster 1913